Dias won back-to-back matches, including an upset of a fellow nationally ranked opponent, to reach Monday’s quarterfinal match. The Lisbon, Portugal native, who is ranked No. 94 in the nation by the Intercollegiate Tennis Association, first defeated Nick Sayer of Radford, 6-1, 7-5, before knocking off Virginia’s No. 51 Harrison Richmond, 6-3, 6-4.

Senior Nikita Fomin, who owns a No. 70 singles ranking, advanced with a 6-4, 6-4 win over Roman Trkulja of Penn State before falling to Virginia Tech’s Joao Monteiro, 6-1, 6-4, in the Round of 16. Sophomore Danil Zelenkov bounced back to earn a three-set victory over the Nittany Lions’ Matt Barry by set scores of 6-7 (7), 7-6 (6), 6-4, but dropped a 6-1, 7-5 match to No. 66 Andreas Bjerrehus of Virginia Tech.

Both doubles teams fell in their respective quarterfinal matches on Sunday. Fomin and Zelenkov were edged in a tiebreaker, 8-7 (7), by the No. 17 pair in the nation in Bjerrehus and Amerigo Contini of Virginia Tech, and the duo of Dias and senior Viktor Svensson were defeated by Penn State’s Russell Bader and Alex Fennell, 8-4.

Dias will face Bjerrehus on Monday at 11 a.m. in a battle of top 100 opponents.

The Intercollegiate Tennis Association (ITA) Atlantic Region includes schools located in Delaware, Maryland, Pennsylvania, Virginia, West Virginia and Washington, D.C. GW is joined by 21 other schools in Bucknell, Delaware, Duquesne, George Mason, Georgetown, James Madison, Liberty, Longwood, Morgan State, Navy, Norfolk State, Old Dominion, Penn State, Radford, Richmond, St. Joseph's, Temple, UMBC, VCU, Virginia and host Virginia Tech. The tournament is a single-elimination format and winners of the singles and doubles flights will earn automatic bids to the ITA National Indoor Championship in November.